Solve the problem.Suppose that a hair dryer operates on a voltage that can be represented by the relation 
and that it draws a current represented by the relation 
where t is time measured in seconds. The power consumed by the appliance is P = VI. Graph the power in 
by 
and use an identity to write the expression for the power in
the form 
where a, k, and d are constants.
A. P = 640 cos(240?t) + 640
[0, 0.04, 0.01] by [-200, 2000, 200]
B. P = -640 cos(240?t) + 640
[0, 0.04, 0.01] by [-200, 2000, 200]
C. P = 640 cos(120?t) + 640
[0, 0.04, 0.01] by [-200, 2000, 200]
D. P = 1280 cos(240?t) + 1280
[0, 0.04, 0.01] by [-200, 2000, 200]
Answer: A
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from 
to 
about the 
A. 9?
B. 18?
C. 9
D. 
?
The function graphed is of the form 
or 
where d is the least possible positive value. Determine the equation of the graph.
A. sin x - 
B. sin 
C. cos 
D. sin 
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A. (-?, ?) B. (4?, ?) C. (4, ?) D. (0, ?)
Find the missing factor.5x2 - 33x - 14 = (x - 7)( )
A. 2x + 5 B. 5x + 2 C. x - 2 D. x + 5